Use stable identifiers for MSC3771 & MSC3773.

changelog.d/13776.feature

@@ -1 +1 @@
-Experimental support for thread-specific notifications ([MSC3773](https://github.com/matrix-org/matrix-spec-proposals/pull/3773)).
+Support for thread-specific notifications & receipts ([MSC3771](https://github.com/matrix-org/matrix-spec-proposals/pull/3771) and [MSC3773](https://github.com/matrix-org/matrix-spec-proposals/pull/3773)).

changelog.d/13824.feature

@@ -1 +1 @@
-Experimental support for thread-specific receipts ([MSC3771](https://github.com/matrix-org/matrix-spec-proposals/pull/3771)).
+Support for thread-specific notifications & receipts ([MSC3771](https://github.com/matrix-org/matrix-spec-proposals/pull/3771) and [MSC3773](https://github.com/matrix-org/matrix-spec-proposals/pull/3773)).

changelog.d/13877.feature

@@ -1 +1 @@
-Experimental support for thread-specific receipts ([MSC3771](https://github.com/matrix-org/matrix-spec-proposals/pull/3771)).
+Support for thread-specific notifications & receipts ([MSC3771](https://github.com/matrix-org/matrix-spec-proposals/pull/3771) and [MSC3773](https://github.com/matrix-org/matrix-spec-proposals/pull/3773)).

changelog.d/13878.feature

@@ -1 +1 @@
-Experimental support for thread-specific receipts ([MSC3771](https://github.com/matrix-org/matrix-spec-proposals/pull/3771)).
+Support for thread-specific notifications & receipts ([MSC3771](https://github.com/matrix-org/matrix-spec-proposals/pull/3771) and [MSC3773](https://github.com/matrix-org/matrix-spec-proposals/pull/3773)).

changelog.d/14050.feature

@@ -0,0 +1 @@
+Support for thread-specific notifications & receipts ([MSC3771](https://github.com/matrix-org/matrix-spec-proposals/pull/3771) and [MSC3773](https://github.com/matrix-org/matrix-spec-proposals/pull/3773)).

synapse/api/filtering.py

@@ -84,6 +84,7 @@
         "contains_url": {"type": "boolean"},
         "lazy_load_members": {"type": "boolean"},
         "include_redundant_members": {"type": "boolean"},
+        "unread_thread_notifications": {"type": "boolean"},
         "org.matrix.msc3773.unread_thread_notifications": {"type": "boolean"},
         # Include or exclude events with the provided labels.
         # cf https://github.com/matrix-org/matrix-doc/pull/2326
@@ -308,12 +309,16 @@ def __init__(self, hs: "HomeServer", filter_json: JsonDict):
         self.include_redundant_members = filter_json.get(
             "include_redundant_members", False
         )
-        if hs.config.experimental.msc3773_enabled:
-            self.unread_thread_notifications: bool = filter_json.get(
+        self.unread_thread_notifications: bool = filter_json.get(
+            "unread_thread_notifications", False
+        )
+        if (
+            not self.unread_thread_notifications
+            and hs.config.experimental.msc3773_enabled
+        ):
+            self.unread_thread_notifications = filter_json.get(
                 "org.matrix.msc3773.unread_thread_notifications", False
             )
-        else:
-            self.unread_thread_notifications = False
 
         self.types = filter_json.get("types", None)
         self.not_types = filter_json.get("not_types", [])

synapse/config/experimental.py

@@ -95,8 +95,6 @@ def read_config(self, config: JsonDict, **kwargs: Any) -> None:
         # MSC2815 (allow room moderators to view redacted event content)
         self.msc2815_enabled: bool = experimental.get("msc2815_enabled", False)
 
-        # MSC3771: Thread read receipts
-        self.msc3771_enabled: bool = experimental.get("msc3771_enabled", False)
         # MSC3772: A push rule for mutual relations.
         self.msc3772_enabled: bool = experimental.get("msc3772_enabled", False)
         # MSC3773: Thread notifications

synapse/handlers/receipts.py

@@ -63,8 +63,6 @@ def __init__(self, hs: "HomeServer"):
         self.clock = self.hs.get_clock()
         self.state = hs.get_state_handler()
 
-        self._msc3771_enabled = hs.config.experimental.msc3771_enabled
-
     async def _received_remote_receipt(self, origin: str, content: JsonDict) -> None:
         """Called when we receive an EDU of type m.receipt from a remote HS."""
         receipts = []
@@ -96,11 +94,10 @@ async def _received_remote_receipt(self, origin: str, content: JsonDict) -> None
                     # Check if these receipts apply to a thread.
                     thread_id = None
                     data = user_values.get("data", {})
-                    if self._msc3771_enabled and isinstance(data, dict):
-                        thread_id = data.get("thread_id")
-                        # If the thread ID is invalid, consider it missing.
-                        if not isinstance(thread_id, str):
-                            thread_id = None
+                    thread_id = data.get("thread_id")
+                    # If the thread ID is invalid, consider it missing.
+                    if not isinstance(thread_id, str):
+                        thread_id = None
 
                     receipts.append(
                         ReadReceipt(

synapse/handlers/sync.py

@@ -279,8 +279,6 @@ def __init__(self, hs: "HomeServer"):
 
         self.rooms_to_exclude = hs.config.server.rooms_to_exclude_from_sync
 
-        self._msc3773_enabled = hs.config.experimental.msc3773_enabled
-
     async def wait_for_sync_for_user(
         self,
         requester: Requester,
@@ -2412,10 +2410,7 @@ async def _generate_room_entry(
                     unread_count = notifs.main_timeline.unread_count
 
                     # Check the sync configuration.
-                    if (
-                        self._msc3773_enabled
-                        and sync_config.filter_collection.unread_thread_notifications()
-                    ):
+                    if sync_config.filter_collection.unread_thread_notifications():
                         # And add info for each thread.
                         room_sync.unread_thread_notifications = {
                             thread_id: {

synapse/rest/client/receipts.py

@@ -50,7 +50,6 @@ def __init__(self, hs: "HomeServer"):
             ReceiptTypes.READ_PRIVATE,
             ReceiptTypes.FULLY_READ,
         }
-        self._msc3771_enabled = hs.config.experimental.msc3771_enabled
 
     async def on_POST(
         self, request: SynapseRequest, room_id: str, receipt_type: str, event_id: str
@@ -67,30 +66,29 @@ async def on_POST(
 
         # Pull the thread ID, if one exists.
         thread_id = None
-        if self._msc3771_enabled:
-            if "thread_id" in body:
-                thread_id = body.get("thread_id")
-                if not thread_id or not isinstance(thread_id, str):
-                    raise SynapseError(
-                        400,
-                        "thread_id field must be a non-empty string",
-                        Codes.INVALID_PARAM,
-                    )
-
-                if receipt_type == ReceiptTypes.FULLY_READ:
-                    raise SynapseError(
-                        400,
-                        f"thread_id is not compatible with {ReceiptTypes.FULLY_READ} receipts.",
-                        Codes.INVALID_PARAM,
-                    )
-
-                # Ensure the event ID roughly correlates to the thread ID.
-                if thread_id != await self._main_store.get_thread_id(event_id):
-                    raise SynapseError(
-                        400,
-                        f"event_id {event_id} is not related to thread {thread_id}",
-                        Codes.INVALID_PARAM,
-                    )
+        if "thread_id" in body:
+            thread_id = body.get("thread_id")
+            if not thread_id or not isinstance(thread_id, str):
+                raise SynapseError(
+                    400,
+                    "thread_id field must be a non-empty string",
+                    Codes.INVALID_PARAM,
+                )
+
+            if receipt_type == ReceiptTypes.FULLY_READ:
+                raise SynapseError(
+                    400,
+                    f"thread_id is not compatible with {ReceiptTypes.FULLY_READ} receipts.",
+                    Codes.INVALID_PARAM,
+                )
+
+            # Ensure the event ID roughly correlates to the thread ID.
+            if thread_id != await self._main_store.get_thread_id(event_id):
+                raise SynapseError(
+                    400,
+                    f"event_id {event_id} is not related to thread {thread_id}",
+                    Codes.INVALID_PARAM,
+                )
 
         await self.presence_handler.bump_presence_active_time(requester.user)
 

synapse/rest/client/sync.py

@@ -100,6 +100,7 @@ def __init__(self, hs: "HomeServer"):
         self._server_notices_sender = hs.get_server_notices_sender()
         self._event_serializer = hs.get_event_client_serializer()
         self._msc2654_enabled = hs.config.experimental.msc2654_enabled
+        self._msc3773_enabled = hs.config.experimental.msc3773_enabled
 
     async def on_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
         # This will always be set by the time Twisted calls us.
@@ -510,9 +511,11 @@ async def encode_room(
             result["ephemeral"] = {"events": ephemeral_events}
             result["unread_notifications"] = room.unread_notifications
             if room.unread_thread_notifications:
-                result[
-                    "org.matrix.msc3773.unread_thread_notifications"
-                ] = room.unread_thread_notifications
+                result["unread_thread_notifications"] = room.unread_thread_notifications
+                if self._msc3773_enabled:
+                    result[
+                        "org.matrix.msc3773.unread_thread_notifications"
+                    ] = room.unread_thread_notifications
             result["summary"] = room.summary
             if self._msc2654_enabled:
                 result["org.matrix.msc2654.unread_count"] = room.unread_count

synapse/rest/client/versions.py

@@ -105,7 +105,7 @@ def on_GET(self, request: Request) -> Tuple[int, JsonDict]:
                     # Adds support for thread relations, per MSC3440.
                     "org.matrix.msc3440.stable": True,  # TODO: remove when "v1.3" is added above
                     # Support for thread read receipts & notification counts.
-                    "org.matrix.msc3771": self.config.experimental.msc3771_enabled,
+                    "org.matrix.msc3771": True,
                     "org.matrix.msc3773": self.config.experimental.msc3773_enabled,
                     # Allows moderators to fetch redacted event content as described in MSC2815
                     "fi.mau.msc2815": self.config.experimental.msc2815_enabled,